Hello dear! That is a good question and I should perhaps elaborate. Basically, that is for any child who is in the beginning of wearing a bra. So basically, those kids who are starting puberty. It seems, some kids are starting it very early now. Where it is now, the ribbon comes around directly below the arms. For girls who are developing, this may be uncomfortable, so the modified version of this drops the ribbon down about 1 1/2 - 2 inches. I hope this makes sense